Ring thread gauge



E .1. BRYANT AND 0. a. muwsow.

RING THREAD GAUGE.

AfPLlCATION FILED MAR. I, 1919.

mm mm. 31, 1w;

Patented Unit. 3i, i922.

urr

nane ELIIIEItJi BRYANT AND CHARLES JOHNSON, OF WOONSOCKET, ISLANJ),

ASSIG-NOR T0 THE 'lAFT-PEIRCE MANUFACTURING CUli IPANY, RHODE ISLAND, A CORPORATION OF RHODE ISLAND. a

RING THREAD GAUGE.

Application filed March. 1,

,T 0 all whom it may concern:

Be it known that we, ELMER J. BRYANT and CHARLES G. JOHNSON, citizens of the United. States, residing at /Voonsocket, in the county ofProvidence, State of Rhode Island, have invented certain new and useful Improvements in Ri11gTh1'6&Cl Gauges, of which the following isa specification.

This invention relates broadly to small tools and more particularly to gauges.

The principal. object of the present invention is a ring thread gauge of the adjustable typeand with adjustment devices constructed to produce the desired adjustments withthe minimum distortion and the maxh mum rigidity when the adjustment is comoleted; i

Another object of the present invention is a ring thread gauge as specified wherein the adjustment members are constructed in suchmanner as to localize both the limiting and the adjusting force's to one place on the gauge thereby avoiding distortionand unequal stresses.

A still further object of the present jinvention is a gauge oi the character specified and wherein the limiting and the adjusting devices are arranged coaxially in such manner that forces resulting from the action of these members are substantially co-lincar forces.

A still further and important object oi the present invention is a ring thread gauge of the character specified. wherein the clum iiiug and adjustingmechanism is sulr stantially a unitary structure adapted to be adjusted and locked. upon itself in such manner as to obviate distortion o'l tthe jaws oi the gauge,

This invention possesses many other and advantageous features some of which, together with the foregoing, will be set out more at length in the following description wherein. will beoutlined in full that form of the invention which we have selected for illustration in the drawings accompanying and forming a part of the present specification. i y

. In the I drawings and specification we have described only the preferred form of our generic invention'and it is to be understood that we do not limit ourselves to such term because our invention may be embodied in a multipliclty ot forms each be- 1919. Serial no. ace one.

ing a species of our invention, it being understood by the claims succeeding the description of our invention that we desire to cover the invention in whatsoever form it may be embodied or practiced.

Figure '1 is an enlarged plan view of one form of our invention.

Figure 2 is a side view of our invention.

Figure 3 is a detail viewshowing a portion of the device in section to more clearly illustrate the adjusting arrangement.

l igure l is adetail view of the clamping nut.

Figure 5 is sleeve.

Gauges which are used. in the manufacture of standard devices necessarily are sub jected to a great deal of wear and particularly is this true with reference to the gauging of certain materials for example aluminum. lliiaterials such as aluminum appear to carry veryhard crystals which very quicklycut or wear the faces of the gauges so that the gauges quickly become distorted and the dimensions enlarge beyond the limits of tolerance so that the gaugecan no longer. be used for the pur pose intended. larly noticeable upon thread gauges which necessarily require considerable movement or engagementwith the work in order to apply the gauge. lVith a thread gauge it is necessary that the gauge be run down upon the threads being tested, which requires several rotati'vc movements of the gauge whereas an ordinary cylinder guage would be subjected to considerably less wear than is the thread gauge since such, a gauge merely slips over the work, rather than being in extended engagcmenttherewith. i

It is extremely important in themanufacture of standard threads thatthe gauges be maintained strictly within the limitsof tolerance. To obviate replacement of a detail view oi the locking I gauges due to this rapid wear various types oi adjustable gauges have been developed,

the general form comprising a rigid bodyasto prjovlde a plui Excessive wear is particu stop is applied at one part of the jaw and the clamp screw is applied at a different part oi? the jaw causes the action oi these members to operate as power and fulcrum members and produces a lever action which may gradually change the set ot the gauge after it is once adjusted. Furthermore, since the stop for limiting the movement of the jaws and the clamp which holds the jaws to the limit set are operative at different points, there is also a tendency of the {ores set up to distort the gauge and thereby destroy its accuracy to the extent of the distortion.

' The gauge comprising the present invention overcomes the difficulties of the known art by arranging the clamping screw and the limiting stop in such manner that the forces produced are co-linear and are applied to the same part of the gauge so that all lever action is obviated and there is no tendency to distort the gauge since the sev eral "forces are applied substantially to one part of the gauge. This arrangement also "facilitates manufacturing the gauge in that the metal of the gauge is substantially uni "form in each aw and any distortion due to aging of the metal is substantially uniform. Furthermore, the arrangement is simple and very compact so that when an adjustment is once made, the adjustment is rigid and secure. There being but one tastening member for both the limiting device'and the clamp screw, the liability of parts to work loose and thereby change the set of the gauge is also minimized.

Referring now more especially to the form we have chosen as illustrative of our invention, the gauge comprises a journal portion which may be divided into wings 1 and 2 by means of a slot 4 which may terminate in a suitable opening 5 to produce spring metal as at 6 so that adjustment of the jaws may be facilitated. Preferably the gauge faces 7 and S are provided in the central portion oi the wings 1. and 2 and are-substantially concentric to the edges of the gauge so that the metal around the gauge faces is substantially uniform.

Adjacent the free end of the wings 1 and 2 the gauge is drilled to provide an opening through which a clamp screw 9 is adapted to extend. A limit sleeve 10 is constructed to'fit over the clamp screw 9 and to be seated against the shoulder ll. This limit sleeve 10 extends into the opposite Wing and is adapted to abut against the clamp nut 12 which preferably is slotter. The threaded end of the clamp screw 9 tightly fits the locking nut 12 so that it tends to expand this member and clamp the same against rotation in the threaded opening 141-.

hen the parts are set in the adjusted position just described it will be noted that the clamp screw 9 is under tension and comprises a tension member. while the sleeve H) is under compression and comprises a com-- pression member. Thus when the gauge is adjusted the tension and compression 111cm bers are concentric, which produces a balancing of the adjustment forces in a main nor that is very desirable and is substantially necessary to provide stable conditions in the gauge.

By the foregoing construction it will be seen that the clamp nut '12 may be adj ustcd by meanns of a suitable tool such as a scrcw driver so that the clamp nut is slightly moved away from the end of the locking sleeve 10. The clamp screw 9 is then tightened by driving this screw into the lock nut 12 until the jaws l and 2 are drawn together suiiiciently to tightly clamp the limit sleeve 10 between the lock nut 12 and the shoulder 11 at which time the adjustment is completed.

As previously explained. it is to be noted that the forces establirishcd by this adjustment are linear forces and are all localized in such manner that there is no tendency to distort the gauge after it is once set.

Having described our invention, what we claim is:

1. A device of the character described comprising a piece of resilient material having a gauge face formed in the middle portion oi said piece in such manner that the material is substantially uniform around the gauge face, said piece being providcd with a slot extending across said gauge face in such manner that the sides oi the gauge taco may be displaced by expanding or contracting the slot. in combination with adjustable means For expanding or contracting said slot and comprising a, com pression member and a tension mcmbcr ar ranged to have a common axis.

2. A device of the character described com prisinga substantially circular piccc otrc il icnt material having a gauge face l'ormcd in the middle portion of said piece in such uranhe]: that the material is substantially uni form around the gauge i'acc. said piccc being provided with a slot extending across said gauge face in such manner that the sides of the gauge face may be displaced by expanding or contracting the slot said slot terminating in a circular opening, in combination with adjustable means for expanding or contracting said slot and comprising a compression member and a tension member arranged to have a common axis and with said tension member adapted to be clamped rigidly when the gauge is adjusted.

3. A device 01" the character described.

comprising a piece oil resilient material having a gauge tace formed in the middle :d' said piece, said piece being providcd with a slot cxtrmdirng across said gauge l'acc fiti tit)

r to permit said stubscrew to be 1,433,528 a 1 ti in such manner that the sidesof, the gauge face may be displaced by adjusting the width of the slot, in combination with ad justable means for adjusting said slot and comprising a tubular compression member, and ,a tension member mounted within and slidable through said tubular compression member. V a 4. A device of the character ClGSCI'llQQCl com risin a iece of resilient material have b mg a gauge facev formed in the middle, of

said piece, said piece being provided with a slot extending across said gauge face insuch manner that the sides of the gauge face may e displaced by adjusting thewidthot the slot, in combination with adjustable means for adjusting said slot and com in'ising a tubular compression member, atension member mounted within and slidable duringadjustment through said tubularcompression member, and an adj ustableabutment for the compression member. a a

5. A thread gauge comprising a body having a pairof wing part of a gauge face, resilient material connecting said wing portionsin such manner as to provide slot severing a portion of the gauge face, in combination with adjust,- able means for said wing portions, said adj ustable means comprising a stub screw tending throughasrnooth opening in one wing portion and extending intoan opening 1n the other wing portion, saidla.s;1t men-- tioned wing portion being provided with screw threads, a screwrthreaded nut adapted to cooperate with the threads in said. wing portion and with threads on said stub screw rotated for adjustment and to permit said nutrto loci: said stub screw in adjustedposition.

6; A device of theoharacter described having a pair of wing mg a part of a gauge connecting said wing tion with adjustable portions, said a stub screw tion to the around said screw, and an :uljustmentnut with which said stub screw is adapted to be engaged. a j i 7. A device of the character portions each carryface, resil ient material portions, 1n combina adjustable means crmiprising extend ng from one wing porpair of wing necting, said wing portions,- in COIIIbl IIZI GlOII with ad ustable means for controlling the relation between said wing portions, said ad ustable means comprising a tenslon screw comprising a gauge member formed with a a pair of wing portions, resilient material con-.

portions which carry a means for said wing other, a tubl'ilar stop member described 7 comprlsing a gauge member formed with a,

portions, resllient material conconstructedto establish co-linear forces to obviate distortion of the I,

1 r 'mannenas to lock meeting said wing portions, in combination with adjustable means ior controlling the relation between said wing portions, said adjustable meanscomprising a tensionscrew and a stop member, an abutment for said stop member,said tension screw and said stopinemberbeingconstructed to establish cowlinearsforces to obviate distortion of the gauge when said stop is clamped. against said t ent l 9. A. ring thread gauge comprising a substantially circular body portion, with a gauge surface in the middle of said body portion, saidgauge surface being bisected by a slot in the body portion of thegauge and dividing the screwextending across said wings, and a nut with which said tension screw engages, and a tubular stop adapted to be engaged by said nut and comprisinga rigid abutment againstwhich saidnut is adapted tobe seated by said tension screw. 1 a a r Id -t ring thread gaugej comprisinga substantially circularbody portion with a gauge surface in the middle of said body portion, said gauge surface, being bisected by a slot inthe body portion, oi the, gauge and dividing the same into wings, a tension screw extendingacross said wings, and a nut withwhich said tension screw engages, and a tubular stop around the tension screw and adaptedrto beengaged bysaid nut, and comprising a rigid, abutment against which said nut is adapted to be seated by said tension screw ,in' such manner as to avoid side stresses 011 the gauge. i i, a i

11. A, thread gauge of the charz icter speci tied comprising a substantiallycircular body, portion havinga gauge fEtGBjfOlI'IlQClill the middle of said body portion, said body portion being slotted across the gauge face in suchmannerasto provide a pair of resillent wings, an adjustment, screw extending between ,said wings, and at substantially: right angles to the plane of the slot, a lock nut with which said adjustment screw is adapted. to engage, said loclr nut being slotted andbeing adapted to be expai'ided by said adjustment screw in such manner as to lock said nut against rotation. a

1 2. A thread gauge of the character specified comprising a substantially circuprovidedwith gauge faces formed in the middle of said body, portion, a said body portion,beingislotted in such manner-as to provide resilient wings, an. adjustment screw, extending between a said, wings, a lock nut with which said adjustment screw isadapted to engage, said lock nut being slotted and being adapted to be expanded by said adjustment screw in such said nut against rotation, and; a rigid stop against which said nut is adaptedito be drawn by said screw.

13. A thread gauge comprising in C0111",

same intowings, a tension i adjusted therein,

bination a body portion formed into resilient wings by beingintersected by a slot, said body portion being provided with gauge faces on each side of said slot, and adjustment means extending across said slot, said adjustment means comprising a tension member and a compression member adapted to establish substantially co-linear forces thereby obviating distortion of the said gauge.

1a. A gauge comprising adjustable portions provided with gauge faces, one of said portions being provided with a smooth surfaced opening and the other of said -por tions being provided with a screw threaded opening, a bolt extending through said openings and being carried by the portion provided with the smooth opening therein, a stop collar surrounding a portion of said bolt, and a locknut provided with both exterior and interior threads, with the exterior threads engaging the threads in said threaded opening and the interior threads engaging the threads on said bolt whereby the gauge faces may be adjusted by the setting of said nut in said portion andby oiperating said bolt to draw said nut against said collar and placing said. collar under com-- pression between the nut and the portion carrying the bolt.

15. A gauge comprising adjustable mem bers each provided with a portion of a gauge surface thereon, said members being provided with axially aligned openings, a shoulder formed upon one of said members, a bolt extendingthrough the said openings and joining saidmembers, a collar surrounding said bolt and adapted to be seated against said shoulder, a nut threaded both exteriorly and interiorl'y, threads provided in the opening of one of said members, said nut being adapted to be screwed into said member and and said bolt being adapted to be screwed into said nut to draw said nut against the end of said collar and clamp the collar against said shoulder whereby said members are rigidly and securely held in adjusted positions,

16. thread gauge com-prising a body portion comprising a pair of adjustable members carrying portions of a gauge surface, said members being provided with openings and with the opening in one of said members being screw threaded, a bolt, a stop collar around said bolt and adapted to abut against one ofsaid members, a nut threaded upon both the exterior and interior and adapted to be screwed onto sald screw threads in said opening and the interior threadsof said nut adapted to receive the threaded end of said bolt in such manner that when said nut is adjusted insaid opening said bolt operates-to clamp the collar between the nut and the member carrying the bolt, thereby securely holding said members in predetermined adjusted-positions.

17. An adjustable thread gauge eomprising a body portion provided with adjustable members carrying gauge faces, said members having axially aligned openings with one of said openings being screw threaded, the opening through the other member being of different diameters in difi'erent portions to provide opposed abutment shoulders, a bolt having a shouldered head adapted to cooperate with one abutment shoulder, a stop collar around said bolt and being adapted to cooperate with the other abutment shoulder, a nut screw threaded both exteriorly and interiorly and being adapted to be adjustable on the screw threads in said member and to receive the screw threaded end of said bolt to clamp said collar between said nut and said last mentioned shoulder.

18. A thread gauge comprising a body portion provided with a plurality of jaws adapted to be adjust-able, said jaws carrying gauge surfaces and being provided with axially aligned openings, a portion of one of said openings being screw threaded a bolt extending through said openings and being provided with a head, a shoulder provided in one of said openings and against which said head is adapted to be seated. :1 nut threaded exterior-1y and interiorly and adapted to be adjusted in said screw threaded opening, said bolt being adapted to be screw threaded into said nut to cause said nut to draw the jaw in which it is seated toward the jaw against which the head of the bolt seats and stop means for limiting said drawing movement.

19. The combination in a female gauge, of an adjustable split body having an interior gauge surface adapted to contact with parts to be gauged, and two exteriorly threaded alined screws provided respectively at their opposite outer ends with means whereby they may be turned, one screw being adapted to separate the ends of the body adj art-mt the split and thereby increase the elfective size of the gauge and the other screw being adapted to draw together the said ends of the body and thereby reduce the elleetive size of the gauge.

20. The combination in a. female gauge, of

an adjustable split cylindrical body pro vided with alined apertures therein adjacent the split and having an interior gauge surface adapted to contact with parts to be gauged, and two alined screws located in the said apertures and within the cylindrical out line of the body, one screw having a cent :11 aperture having screw threads therein and being adapted to separate the ends of the body adjacent the split and thereby increase the effective size of the gauge and the other screw extending into the aperture in the first screw and being adapted to draw together the said ends of the body and thereby reduce the eilective size of the gauge.

Ill)

split to be gauged, a

ass tee 21. The combination in a femalegauge, of an adjustable split body having an interior gauge surface adapted to contact with parts to be gauged, two alined screws, one adapted to separate the ends of the body adjacent the and thereby increase the effective size of the gauge and the other adapted to draw together the said ends ofthe body and thereby reduce the effective size of the gauge, and a sleeve surrroundmg one screw and seated 1n. apertures 1n thesaid ends ot the body tor holding them against relative transverse movement. y a

22. The combination in a female gauge, of an adjustable split body having an interior gauge surface adapted to contact with parts sleeve seated in apertures in the ends of the body adjacent the split for holding them against relative transverse movement, and tWo alined screws, one bearing against the sleeve and adapted to separate the said ends of the body and thereby increase the effective size of the gauge and the other extending through the sleeve and adapted to draw together the said ends of face adapted to contact transverse the body and thereby reduce the effective size of the gauge.

23. The combination in alemale gauge, of

an adjustable split cylindrical body provided With alined apertures therein adjacent the split and having an lnterior gauge surgauged, a sleeve seated in said apertures for holding the alined.

With parts to be a and thereby reduce the effective size of the is 3111 6. 5 b ELMER J. BRYANT.

CHARLES e. JOHNSON. 

